Feeding mechanism for sewing-machines



(No Model) J. BOLTON.

FEEDING MBGHANISM FOR SEWING MACHINES. No. 484,396.' Patented Oct. 18, 1892.

UNITED STATES PATENT OFFICE.

JAMES BOLTON, OF OHICAGO, ILLINOIS.

FEEDING MECHANISM FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 484,396, dated October 18, 1892.

Application filed February 2, 1892.

' To all whom it may concern.-

Be it known that I, J AMES BOLTON, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Feeding Mechanism for Sewing-Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to a feeding mechanism for sewing-machines in which a four-motioned feed-dog is operated positively in all directions, the object being to provide a feeding mechanism of this class which will be simple in construction and efficient in operation and in which the feed may be easily regulated and may be reversed during the operation of the machine, if desired, so as to move the work toward the operator, as well as in the usual direction from the operator.

In the accompanying drawings, Figure 1 is a bottom View of the work-plate of a sewingmachine provided with my improved feeding mechanism. Fig. 2 is a side view of the same, taken from the front or the side on which the operator usually sits. Fig. 3 is a sectional elevation on line 3 3, Fig. 1. Fig. 4 is a detail sectional view to showthe stitch-regulating device.

A denotes the usual bed-plate of a sewingmachine, the arm and the other parts above the same being omitted for simplicity of illustration.

B is a rotating shaft journaled in suitable bearings beneath the bed-plate A, said shaft to be rotated in any suitable manner. The shaft B carries two feed-operating cams b and b, the former being embraced by a yoke 0 formed on the feed-bar O, which carries a feeddog 0 of any suitable construction, and the said cam serving to impart positive up-anddown movements to the said feed-bar in a well-known manner and at proper intervals. The feed-bar O is formed rigid with a sleeve 0', which is pivoted in a rocker D, having bearings on center screws 61 tapped in lugs or hangers a on the bed-plate A, the said rocker having vertical arms d, to the upper end of which the said sleeve is connected. The cam b is embraced by a yoke e,formed on a bar E, which is also pivoted to the upper ends of the arms 01 of the rocker D, this Serial No. 420,037. (No model.)

pivotal connection in the present instance being afforded bya suitable center screw d and a pin or shaft 6, entering the sleeve 0, and with which pin the said bar is rigid.

The bed-plate A is provided with a lug or hanger a, in which is pivoted afeed-regulating block F, provided with suitable flanges, forming between them a groove, in which a pin or roller-stud e on the bar E works as the said bar is raised and lowered by its cam b. The feed-regulating block F, being pivoted in the lug or hanger a, may be adjusted to different positions to vary the inclination of the flanges f, between Which the pin or rollerstud e works, and thus as the said bar E is raised by its cam it will be caused to move horizontally by reason of the contact of the stud c with the flanges f of the block F, this horizontal movement being greater orless, according to the inclination of the said block. As the bar E is thus caused to move horizontally, such horizontal movement will be imparted to the upper ends of the arms d of the rocker D, and as the feed-bar O is connected with the upper ends of the said arms it will be obvious that said feed-bar will also receive horizontal movements from the swinging. arms d.

G denotes a feed-regulating shaft suitably journaled beneath thelwork-plate of the machine and provided with an arm g, extending upward through the work-plate A in convenient position to be manipulated by the operator. The shaft Gr has at its forward end a second arm g, connected by a link It with an arm i, which is rigid with the feed-regulating block F, so that by operating the said arm or lever g the said block F may be adjusted to different positions to vary the inclinations of the flanges f relative to a vertical plane, and thus regulate the throw of the feed-dog, as may be desired. When the block F is so adjusted that the flanges f are vertical, no horizontal movements will be imparted to the feed-bar C; but by inclining the said flanges more or less relative to a vertical plane a greater or less feed movement will be given to the said feed-bar, and if it be desired to reverse the feed to feed the work toward the operator, instead of in the usual direction, this may readily be accomplished by moving the feed-regulating arm or lever g to the position denoted by dotted lines in Fig. 4, thus revers-' z p I 484,396

ing the feed-block F and causing the feed-bar to move toward the operator.

It will be understood that owing to the quartering arrangement shown by the cams b and 1), working in their respective yokes, the movements imparted to the said yokes will alternate with each other; or, in other words, the feed-bar C will first be lifted, and while it remains in its raised position the bar E will next be lifted, causing the feed-bar, through its described connections with the arms (1 of the rocker, to be moved forward, and when this movement has been effected the feed-bar will next be lowered, and then the bar E will be lowered, causing the feed-bar C to be retracted, the cams thus alternating in their actions and imparting a well-known four-motioned movement to the feed-dog. It will thus be apparent that with the simple mechanism shown Iain enabled to provide astrong and positive feed, which may be easily regulated and which may be reversed when desired for the purpose of stitching backward.

Having thus described my invention, I claim and desire to secure by Letters Patcut-- 1. The combination, with the rotating shaft provided with the quartering feed-cams band I), of the bars Oand E, having yokes embracing said cams, the said bar E being provided with a pin or roller-stud, a rocker to the arms of which the said bars are jointed, and an adj ustable feed-regulating device provided with a groove in which the said pin or roller-stud works vertically.

2. The combination of the rotating shaft provided with the cams b and b, the rocker D, having arms d, the feed-bar 0, having a yoke embracing the said cam b and provided with a suitable feed-dog, the bar E, having a yoke embracing the cam Z2 and being provided with a pin or roller-stud,the feed-regulating block F, having a suitable groove receiving said pin or roller stud, the feed-regulating shaft, G, having the operating-arm g, and a second arm connected by a link h with the said feed-regulating block F, whereby the position of the latter maybe changed to vary the throw of the feed-dog.

In testimony whereof I afiix my signature in presence of two witnesses.

JAMES BOLTON. Witnesses:

HENRY CALVER, HELoN V. CUSHMAN. 

